1 Urticaria Center of Reference and Excellence (UCARE), Institute of Allergology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
2 Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin, Germany.
3 School of Medicine, Lebanese American University, Byblos, Lebanon.
4 Institut National de Santé Publique d'Épidémiologie Clinique et de Toxicologie-Liban (INSPECT-LB), Beirut, Lebanon.
5 Department of Primary Care and Population Health, University of Nicosia Medical School, Nicosia, Cyprus.